Non-volatile memory device and program method thereof

Abstract

A method for programming a non-volatile memory device including a plurality of memory cells includes verifying whether the memory cells are programmed or not by applying a program verification bias voltage, which is calculated and stored during an initialization operation preformed before the programming of the memory cells, after a program voltage is applied to word lines of the memory cells.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority of Korean Patent Application No. 10-2011-0037514, filed on Apr. 21, 2011, which is incorporated herein by reference in its entirety.BACKGROUND[0002]1. Field[0003]Exemplary embodiments of the present invention relate to a non-volatile memory device and a program method thereof, and more particularly, to a non-volatile memory device that may reduce a program unit time and a program method thereof.[0004]2. Description of the Related Art[0005]Memory devices are divided into volatile memory devices and non-volatile memory devices according to whether data are retained when a power supply is cut off. Volatile memory devices are memory devices which lose the data stored therein when a power supply is cut off. Examples of the volatile memory devices include Dynamic Random Access Memory (DRAM) devices and Synchronous DRAM (SDRAM). On the other hand, non-volatile memory devices retain the data stored therein ...

AI Technical Summary

Benefits of technology

[0023]An embodiment of the present invention is directed to a non-volatile memory device which may reduce a program unit time by calculating and storing a program verification bias voltage in advance before a program voltage is applied and then applying the stored program verification bias voltage to a corresponding word line after the program voltage is applied, and a program method thereof.

[0024]Another embodiment of the present invention is directed to a non-volatile memory device that may be used for a high-speed operation by reducing a program unit time, and a program method thereof.

Problems solved by technology

Volatile memory devices are memory devices which lose the data stored therein when a power supply is cut off.

Particularly, since the application of the program pulse and the application of the program verification bias voltage according to the program operation are performed iteratively, the resulting increase in the program unit time as described above delays the program operation.

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